51103043664 has 40 divisors (see below), whose sum is σ = 139781856960. Its totient is φ = 16032327168.

The previous prime is 51103043657. The next prime is 51103043671. The reversal of 51103043664 is 46634030115.

51103043664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51103043657) and next prime (51103043671).

It is a super-2 number, since 2×51103043664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31312324 + ... + 31313955.

It is an arithmetic number, because the mean of its divisors is an integer number (3494546424).

Almost surely, 2^51103043664 is an apocalyptic number.

It is an amenable number.

51103043664 is an abundant number, since it is smaller than the sum of its proper divisors (88678813296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51103043664 is a wasteful number, since it uses less digits than its factorization.

51103043664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62626307 (or 62626301 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 51103043664 its reverse (46634030115), we get a palindrome (97737073779).

The spelling of 51103043664 in words is "fifty-one billion, one hundred three million, forty-three thousand, six hundred sixty-four".